In the sentence, certain words are in bold and numbered from A to E, which are the possible pairs to be interchanged.Choose the pair(s) of words which need to be interchanged to make the sentence grammatically correct and meaningful.

Never has this been more (A) important than during the current global health crisis, when official (B) invasions is being scaled back, bringing the (C) threat of an (D) escalation of (E) monitoring on indigenous territories.